Device for admitting gas into vacuum-tubes.



BAUER. DEVICE FOR ADMITTING GAS INTO VACUUM TUBES.

v APPLICATION FILED JUNE 2,1908.

Patented Dec. 1, 1908.

2 SHEETS-SHEET l.

,llll/Il/I/I//////////II/I/Illllllllll/ i- H. BAUER. DEVICE FOR ADMITTING GAS INTO VACUUM TUBES APPLICATION FILED JUNE 2,1908.

Patented Dec. 1, 1908.

2 SHEETS-SHEET 2.

HElNZ BAUER, OF BERLIN, GERMANY.

DEVICE TOR ADKITTING GAS INTO VACUUM-TUBES.

no. comets.

flpecificafi on of Letters Patent.

Patented Dec. 1 1908..

Application filed rum 2, 190a. Serial n. 436,268.

To all whom it may concern: Be it known that I, Hnmz BAUER, a sub 'ect of the German Emperor, and residing at j erli'nfGermany, have invented, certain new and useful Improvements in Devices for Admittin the 0 owing is a specification. y

The subject-matter of the present invention is a device for admitting gases intoreceptacles which enables a very exactly measured quantity of air or gas to pass into the interior of vacuum tubes, for example Rontgen tubes, independently of the time during which the device is opened. The invention is characterized by the spigot and the handle of the same having passa es or chambers passing entirely or partia ly through them, which are in connection with the atmosphere or a gas-receiver. Inone position ofthe handle of the faucet the passages of the faucet are conand Fig. 3 a p an corresponding to nected on the one hand with the atmos here or a gasreceiver, and on the other han with a small hollow chamber or cavity rovided in the casing of the faucet, so that t e latter chamber is filled with a definite quantity of airor gas. 'Ifthe faucet is then turned, so

that. a special opening of the s igot is brought into communication with t e cavity, the quantity of the as or air in the cavity then passes through t e hollow spigot into the interior of the vacuum tube. In this manner it is possible to regenerate Rontgen tubes,

for exampley a very small but exactly measured quantity of air being allowed to pass into the tube by simply'turning the handle of the faucet. In order that the invention .may be clearly understood, reference is made to the accompanying drawing in'which several embodiments are represented by way of example, and in which a Figure 1 is a vertical section through one constructional form of the measuring faucet in one position of the spigot, Fig. 2 being a like section in another position of the s igot, i 1. Fig. 4 is a vertical sectional elevation if a .part of the'body or casing of the faucet, in order to show the cavity or chamber provided in the side of the faucet. Fig. 5 is a section on the line AB in Fi .1, whereas Fig. 6 is a vertical sectional e evationof a modified constructional form. i

The lower end of thecasing or body a of the faucet is shown broken off in the drawing Gas into Vacuum-Tubes, of which and is connected with a vacuum. tube, whereas the upper end incloses the spigot b which, in the constructional form repre .sented, is formed completely hollow, both in its body and in i'ts'han'dle d. The hollow handle (1 is connected with a tube a which, in one'position of the s igot, can be brou ht into agreement with-t e cavity 0 provi ed in a'bulge k in the body a of the faucet. This osition is shown in Fig. 1. The atmos han le (1 and the tube e into the cavity or chamber 0 and .will com letely fill this. This cavity, which only holds a very small quantity of air, is dimensioned exactly corres ondin to the concerned purpose.

he bo y b of the spigot has in addition a hole f. If the spigot is rotated so-that this aperture f is brou ht into exact agreement with the cavity 0, t e latter is then connected with the interlor of the vacuum tube through the holenf and the chamber of the spigot b. The sma quantity of air or gas in the cavity will therefore flow into the evacuated chamber of the tube and be diffused there The spigot b, which is formed'hollow in the constructional form represented, may also be made solid. In this case, however, besides the tube e, which leads to the hollow handle (1, an additional s ecial tube would have to be provided which can connect the hole f with the interior of the vacuum tube. Ifdesired the hole f could also be connected by a groove leading to the lower free end of the spigot.

If it is a matter of evacuated bodies which are exceedingly sensitive to the admission of gas, the faucet can be still more improved y atmospheric air, or gas corresponding to it, not being allowed to enter directly into the principal spigot, but by a measuring spigot being arranged at a sultable place, for

example in the handle, which second spigot first supplies a measured quantity of gas into the chamber of the principal spigot. Such a constructional form is shown in Fig. 6.

The handle cl of the spigot b is closed at one end, whereas a special spigotg is provided at the other end. The position of the spigot g is first such that a cavity or chamber 71. provided in the handle d, which cavity may be formed similarly to the cavity 0 in the form according to Figs. 1 t0 5, can be filled with a definite quantity of air or gas.

If the s igot g is turned, the connection between t e cavity-or chamber h and the outer eric air can then pass through the tional form has the great advantage that the difference of pressure outside and inside the evacuated vessel is divided into partial differences of pressure, which again press with undiminished force on the rubbing surfaces.

What I claim as my invention and desire to secure by Letters Patent is:

1. A device for admitting air or gas into evacuated receptacles, comprising in combination a body of a faucet having a cavity in its side, and a spigot provided with a handle adapted to said body, the body of the spigot and said handle containing chambers, a tube in the body of the spigot adapted to connect the chamber in the handle with said cavity,

the body of said spigot having a hole adapted to connect said .cavity with the interior of its side, and a spigot provided with a handle adaptedto said body, the body of the spigot and said handle containing chambers, atube in the body of the spigot adapted to connect the chamber in the handle with said cavity, the body of said spigot having a hole adapted to connect said cavity with the interior of said body of the faucet, said handle being provided with a spigot and a measuring faucet, substantially as described.

- In testimony whereof, I affix my signature in the presence of two witnesses.

HEINZ BAUER.

Witnesses HENRY HASPER, WOLDEMAR HAUPT. 

